2hh0
From Proteopedia
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| - | + | {{STRUCTURE_2hh0| PDB=2hh0 | SCENE= }} | |
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'''Structure of an Anti-PrP Fab, P-Clone, in Complex with its Cognate Bovine Peptide Epitope.''' | '''Structure of an Anti-PrP Fab, P-Clone, in Complex with its Cognate Bovine Peptide Epitope.''' | ||
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[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Kanyo, Z K.]] | [[Category: Kanyo, Z K.]] | ||
| - | [[Category: | + | [[Category: Fab]] |
| - | [[Category: | + | [[Category: Prion]] |
| - | [[Category: | + | [[Category: Prp]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 06:17:03 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 03:17, 4 May 2008
Structure of an Anti-PrP Fab, P-Clone, in Complex with its Cognate Bovine Peptide Epitope.
Overview
Bovine spongiform encephalopathy (BSE) is a fatal neurodegenerative prion disease affecting cattle that is transmissible to humans, manifesting as a variant of Creutzfeldt-Jakob disease (vCJD) likely following the consumption of meat contaminated with BSE prions. High-affinity antibodies are a prerequisite for the development of simple, highly sensitive and non-invasive diagnostic tests that are able to detect even small amounts of the disease-associated PrP conformer (PrP(Sc)). We describe here the affinity maturation of a single-chain Fv antibody fragment with a binding affinity of 1 pM to a peptide derived from the unstructured region of bovine PrP (BoPrP (90-105)). This is the tightest peptide-binding antibody reported to date and may find useful application in diagnostics, especially when PrP(Sc) is pretreated by denaturation and/or proteolysis for peptide-like presentation. Several rounds of directed evolution and off-rate selection with ribosome display were performed using an antibody library generated from a single PrP binder with error-prone PCR and DNA-shuffling. As the correct determinations of affinities in this range are not straightforward, competition biosensor techniques and KinExA methods were both applied and compared. Structural interpretation of the affinity improvement was performed based on the crystal structure of the original prion binder in complex with the BoPrP (95-104) peptide by modeling the corresponding mutations.
About this Structure
2HH0 is a Single protein structure of sequence from Mus musculus, homo sapiens. Full crystallographic information is available from OCA.
Reference
Directed evolution of an anti-prion protein scFv fragment to an affinity of 1 pM and its structural interpretation., Luginbuhl B, Kanyo Z, Jones RM, Fletterick RJ, Prusiner SB, Cohen FE, Williamson RA, Burton DR, Pluckthun A, J Mol Biol. 2006 Oct 13;363(1):75-97. Epub 2006 Jul 21. PMID:16962610 Page seeded by OCA on Sun May 4 06:17:03 2008
